Vulcanizer



Oct' 41927 c. avnunsoN E1- AL 1644433 vULcANIzR Filed Dec. 5, 1926 I HENRY V bv/mw,

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Patent Got. 4, l2?.

CHARLES 2B. HUDSON, 0F

PORATION OF OHIO.

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'ffl C. BOSTWICK, 0F KENMORE, OHIO, AS

lf 02H10, A COR- vuncanrznn.

Application led December 3, 1929. Serial No. 152,388.V

This invention relates to vulcanizing molds such as used in watchcase vulcanizers or other vulcanizers having relatively movn able mold Sections for curing inner tubes or other -annular articles.

The general purpose ofthe invention 1s to provide an im roved means for quickly mounting inflat-ab e, annular rubber articles in vulcanizers, whereby to prevent localized searing of the surface ofthe article against the hot surfaces of the molds before the article is fully enclosed by the molds and inflated to expand it against the mold surface.

The foregoing and other purposes are attained' by the construction illustrated 1n the accompanyin drawings and `described below. AIt is to e understood that the invention is not limited to the specific form 2o thereof shown and descrlbed.

Of the accompanyin drawings,

Figure 1 is a radia section through the cooperating sections of a watchcase :vulcanizer having an inner tube 1n position for vulcanization therein;

Figure 2 is a detail section on line 2--2 of Figure 15 I Figure 3 1s a slmllar view showin equipment for molding tubes having -valves 80 therein; U y

Figure 4 is an inner plan view of the construction shown in Figure 3; and

Figure 5 is a radial section illustrating the manner of mounting the tube.

the central section of a watchcase vu camzer to which is removably secured a moldsection 11 heated b steam led into a cavity 12 in section 10. 'nged for movement'to or from cooperation with section 10 of the vulcanizer is a section 13 on which is removably secured a mold section 14 arranged to coo erate with mold section 11.

or molding inner tubes or other inat able articles an inner tube supportin ring 15 is provided, preferably of integra construction and preferably secured to the inner section 11. A locking ring 16 is shown for securing the sections 10 an 13 together durin vulcanization.

o provide for quickly mounting the tube shown at 17 on the ring 15 the latter is formed with a comparatively large, inwardly tapered valve aperture 18 in which a valve plug 19 is arranged removably to scat.

Referringto the drawings, 10 re resientev Plug!19-sformed with a valve aperture 2() so s aped as to provide a shoulder 20a for seating the clampin washer'21 of the inner tube valve and a s oulder 20b for seating the clamping nut 22 of the tube valve. t A nut 23 is arranged to be threaded onto the barrel of a Straight valve 2li to securey the plug 19 to the valve.

ln equipment for S-valves, the ring 15EL is cut away as at 15b to clear the valve 24?. To secure the plug 19a to the valve 24, a locking plate 25 is rotatably mounted on the plug 19 by bolts 26, 26 engaged through arcuate slots 27, 27, the plate 25 having a. radial slot 28 therein' adapted in one position to permit the mounting of the plu 19l on the valve, the plate 25 being rotatab e to a position, as shown in Fi re 4, such as to engage the circumferential y directed shank of the S-valve to clamp the plug 19al therecn.

The mounting of the tube 17 inthe vulcanizer is illustrated in Figure 5. The plug 19 is first secured tothe valve as shown and the valve inserted through aperture 18 sufticiently to connect a fluid pressure supply line 29 for iniating the tube. The tube is then quickly mounted in place on ring 15, plug 19 finding its seat in a erture 18, the vulcanizer being closed and ocked and the iniiation pressure immediately supplied to the tube in a` minimum period of time, localized searing of the tube being avoided.

Modifications of the invention may be resorted to without departing from the spirit thereof or the sco e of the appended claims.

What is clame is: Y

1. A watchcase vulcanizer for useA in cur- -ing annular, inflatable articles, said vulcanizerv including a stationary heated section and a hinged heated section movable into cooperation therewith, mold sections respectively supported on the sections, an integral ring secured on the stationary mold section for supporting the inner periphery of the article and havin a comparatively large, inwardly tapere valve aperture therethrough, a lug adapted to fit in said aperture, means orsecuring the plug to thevalve stem of said article, and means for locking the vulcanizer sections together.

2. A vulcanizer for use Ain curing annular, inflatable articles, said vulcanizer including relatively movable heated sections, mold sections respectively supported on the sections,

af'riiig s ecuredfon one mold section for su porting the inner periphery of the artice and havin a comparatlvely large, inwardly ta ered va ve aperture therethrough, a plug a apted to fit 1n said aperture, means for securing the plug to the valve stern of said article, and means for locking the vulcanizer sections together. l e

3. A steam backed mold construction for curing annular, inflatable articles, including separable mold sections each backed by steam chambers, a ring for supporting the inner periphery of the article between the sections; and having a comparatively large,

tapered aperture therethrough, and a plug for said aperture adapted to be secured to the iniating valve of said article.

4. A steam backed mold construction for curing annular, inflatable articles having S- v-alves thereon, including separable mold` sections each backed by steam chambers,a

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ring for supporting the inner peri hery of i the article etween the sections an having a comparatively large, tapered aperture therethrough, a plug for said aperture adapted to be secured to the inflating valve of said article, and means' `for securlng the plug to said valve including a rotatable clamping plate mounted on the plu and adapted to pass over the shank of t e S- yalve and then to be rotated into engagement with theshank thereof.

, 5. A mold for curing-annular, inflatable the valve.

CHARLES B. HUDSON. HENRY'C. BOSTWICK.

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